Patents by Inventor Eric V. Johnston

Eric V. Johnston has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Compositions and methods for determining canine gender
    Patent number: 7300752
    Abstract: The present invention provides methods to determine gender of a canine subject, that include contacting a nucleic acid sample from the canine subject with at least one probe or primer specific for canine amelogenin, and using the binding of the at least one probe or primer to detect a difference between the canine amelogenin gene on the Y chromosome and the canine amelogenin gene on the X chromosome, thereby determining gender of the canine subject. In certain aspects, gender of the canine subject is determined by contacting the nucleic acid sample with a primer pair that generate different sized amplification products depending on whether an X chromosome or a Y chromosome copy of the canine amelogenin gene is amplified.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: November 27, 2007
    Assignee: MMI Genomics, Inc.
    Inventors: Bonita J. M. Ferrie, Eric V. Johnston, Sue DeNise
  • Multi-tone photomask and method for manufacturing the same
    Patent number: 6803160
    Abstract: A multi-tone photomask and method for manufacturing the same are disclosed. A photomask includes a filter layer formed on at least a portion of a substrate. The filter layer includes a first pattern formed by a first etch process. A barrier layer including the first pattern is formed on at least a portion of the filter layer by a second etch process. An absorber layer including a second pattern is formed on at least a portion of the barrier layer by a third etch process. The barrier layer further acts as an etch stop for the third etch process.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: October 12, 2004
    Assignee: DuPont Photomasks, Inc.
    Inventors: Eric V. Johnstone, Franklin D. Kalk
  • Compositions and methods for determining canine gender
    Publication number: 20040146915
    Abstract: The present invention provides methods to determine gender of a canine subject, that include contacting a nucleic acid sample from the canine subject with at least one probe or primer specific for canine amelogenin, and using the binding of the at least one probe or primer to detect a difference between the canine amelogenin gene on the Y chromosome and the canine amelogenin gene on the X chromosome, thereby determining gender of the canine subject. In certain aspects, gender of the canine subject is determined by contacting the nucleic acid sample with a primer pair that generate different sized amplification products depending on whether an X chromosome or a Y chromosome copy of the canine amelogenin gene is amplified.
    Type: Application
    Filed: January 9, 2004
    Publication date: July 29, 2004
    Applicant: Metamorphix, Inc.
    Inventors: Bonita J.M. Ferrie, Eric V. Johnston, Sue DeNise
  • Multi-tone photomask and method for manufacturing the same
    Publication number: 20030118920
    Abstract: A multi-tone photomask and method for manufacturing the same are disclosed. A photomask includes a filter layer formed on at least a portion of a substrate. The filter layer includes a first pattern formed by a first etch process. A barrier layer including the first pattern is formed on at least a portion of the filter layer by a second etch process. An absorber layer including a second pattern is formed on at least a portion of the barrier layer by a third etch process. The barrier layer further acts as an etch stop for the third etch process.
    Type: Application
    Filed: December 12, 2002
    Publication date: June 26, 2003
    Applicant: DuPont Photomasks, Inc.
    Inventors: Eric V. Johnstone, Franklin D. Kalk